Habitat is a model community constructed along the St. Lawrence River in Montreal (Montréal), composed of 354 prefabricated modules which combine to form a three-dimensional space structure. The modules, or 'boxes' as they are known, are connected in varying combinations to create 158 residences ranging from 600 ft2 to 1,700 ft2. Pedestrian streets serve as horizontal circulation throughout the entire complex. Habitat '67 was the realisation of Moshe Safdie's thesis titled A Case for City Living, A Study of Three Urban High Density Housing Systems for Community Development' and was also the major theme exhibition of the 1967 Montreal (Montréal) World Exposition.' Source: the Moshe Safdie Archives at McGill University, Montreal (Montréal)